The National Geographic Magazine, Volumes 76-77National Geographic Society, 1940 - Geography Indexes kept up to date with supplements. |
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Page 146
RUBBER MAKES COBWEBS FOR A MINE IN THE MOVIES The synthetic strands are rubber cement blown from a spray gun . Goodrich engineers calculate that a pint of the cement yields a slender thread that would stretch from Los Angeles farther ...
RUBBER MAKES COBWEBS FOR A MINE IN THE MOVIES The synthetic strands are rubber cement blown from a spray gun . Goodrich engineers calculate that a pint of the cement yields a slender thread that would stretch from Los Angeles farther ...
Page 150
Having solved the problem of keeping rubber free from " pinholes , " thus making it watertight and airtight , chemists soon were hunting ways of putting more holes in rubber . They worked on that one for eight years or more ; now ...
Having solved the problem of keeping rubber free from " pinholes , " thus making it watertight and airtight , chemists soon were hunting ways of putting more holes in rubber . They worked on that one for eight years or more ; now ...
Page 174
... rubber - sealed emergency breathing apparatus from the General Tire and Rubber Company's laboratories was first tried out on this victim of infantile paralysis . Placed over the patient's chest , the rubber ring and sponge - rubber flap ...
... rubber - sealed emergency breathing apparatus from the General Tire and Rubber Company's laboratories was first tried out on this victim of infantile paralysis . Placed over the patient's chest , the rubber ring and sponge - rubber flap ...
Contents
Home Life and Industry in the Netherlands II illustrations in duotone from photographs | 271 |
History of Ancient Bridge Building and Road Making | 347 |
Italys Monuments Tell Romes Magnificence 8 illustrations from photographs 7 illus | 371 |
Copyright | |
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